The reaction of (Sp)-2-(diphenylphosphino)ferrocenecarboxylic acid with carbodiimide reagents: Characterisation of the acid anhydride and urea products
作者:Martin Lamač、Josef Cvačka、Petr Štěpnička
DOI:10.1016/j.jorganchem.2008.07.042
日期:2008.10
nucleophiles. The reaction between (Sp)-1 and DCC was found to give preferentially the respective urea derivative in the absence of a base, and (Sp)-2-(diphenylphosphino)ferrocenecarboxylic anhydride [(Sp,Sp)-3] when the same reaction was performed in the presence of 4-(dimethylamino)pyridine (DMAP). With EDC, the preference for a reaction pathway was less pronounced: whereas the reaction without the base